Workmanship

Wiring

Universal to oxygen sensor's harness (wire-cut required)

Adjustment

Heater adjustment required. Signal adjustment not recommended.

Working Theory

A popular alteration amongst performance enthusiasts is to remove, gut or hollow the cat or to install an aftermarket header, to free the horsepower of the vehicle. Nowadays, vehicles are fitted with two up to four exhaust gas oxygen sensors, at least one front lambda sensor that controls the fuel management system, and at least one aftercat that monitors converter function. When the aftermarket headers are installed or cats are eliminated, the result is a catalyst efficiency check engine light code indicating that the converter is missing or not working properly. The modified engine now produces a larger amount of exhaust gases than allowed. Obviously you do not want to drive your Jeep Wrangler Rubicon with a constant CEL, further your vehicle will not pass emissions in many areas with an illuminated SES light. The only solution is to install an Jeep Wrangler Rubicon O2 simulator wired up to the aftercat o2 sensor’s harness in order to emulate a properly working oxygen sensor. It supplies the Powertrain Control Module with mimic, fluctuating voltage signal and overrides the Electronic Control Module into thinking the emission is normal. This Jeep Wrangler Rubicon oxygen sensor simulator will allow you to run without cats and still keep the ECU warning light off.

When check the engine light is tripped, the engine runs in ECM safe / limp mode, which is equivalent to restricted horsepower and ruined fuel mileage. This Heated Jeep Wrangler Rubicon O2 Sensor Simulator eliminates up- and downstream sensors as well, fulfilling the prerequisite of sensor type, thus you can get rid of miffing MIL light. Magnum Oxygen sensor simulator is available to all vehicles on which the emissions are monitored through a 1 up to 4-wire narrowband zirconia oxygen sensors working in a 0 up to 1.0 Volt fluctuating voltage range. It also features a standalone adjustable heater simulator circuit. Feel free to contact our engineers prior to purchase if you are unsure about your Jeep Wrangler Rubicon's sensor type. Magnum Oxygen sensor simulator cures all catalyst efficiency and other exhaust o2 sensor related check engine light CEL codes caused by heavy exhaust alterations. Dual exhaust with two downstream air fuel sensors requires 2 O2 sensor simulators. Our digital O2 Sensor Simulator is adjustable, making you enable to adjust the Air Fuel Ratio within a certain range that is still accepted by the Electronic Engine Management. You can now completely eliminate the zirconia narrowband type air fuel sensor.

Note

upstream oxygen sensor has to work flawlessly. Slow signal of precat exhaust gas oxygen sensor may prevent the oxygen sensor emulator from working. Headers require both up- and downstream Oxygen sensor emulation. In case of a single air fuel sensor or dual pipe exhaust system fitted with 2 air fuel sensors only, the oxygen sensor simulator taps into these o2 sensors. Oxygen sensor simulator is a racing part. It is not CARB approved. Please be aware of the bylaws and regulations, O2 sensor eliminator is not street legal in several US states and countries.

Magnum Jeep Wrangler Rubicon Oxygen Sensor Simulator is a must-have upgrade if you are planning to remove, hollow or gut the catalyst or even if you installed a cat bypass, an aftermarket header, a free flow catback or high performance catalytic converter. Are you in the market for the ultimate solution for curing exhaust o2 sensor related CEL on your Jeep Wrangler Rubicon? Then you’ve come to the right place.

Are you concerned that ECM safe / limp mode was tripped due to the exhaust modification made on your Jeep Wrangler Rubicon? Are you fed up with resetting the PCM repeatedly? Get rush and install this oxygen sensor emulator on your Jeep Wrangler Rubicon. With minimum efforts you can sort out the ECM safe / limp mode all on your own, as long as you are mechanical and electrical minded. Conduct the installation and feel the crackle of HP again beneath the hood.

Packing List

1 x Oxygen Sensor Simulator

4 x Bullet Connectors

4 x Heat Shrink Tubing

1 x Stainless Steel Washer

1 x Stainless Steel Nut

1 x Installation Instructions

h5How can I figure out my sensor is a zirconia type?/h5 Zirconia type exhaust gas oxygen sensors have 1 to 4 wires. 1 to 3 wires indicate a zirconia narrowband lambda probe definitely. In the case of 4 wires, two of the wires have to be identical for heater, whilst the rest 2 wires have to be different for signal sender and signal ground. Always reference the sensor-side colors of the wires coming out off of sensor head. ECU-side colors may convert through the plugs. h5 How to find out if it's a narrowband or wideband?/h5 Typically 1 to 4-wire oxygen sensors are narrowband. There are exceptions though. A narrowband oxygen sensor's signal is constantly fluctuating in a range of 0 to 1.0 Volts depending on oxygen content in the exhaust gas. Any oxygen sensor that produces higher voltages, is determined to be a wideband oxygen sensor. Keep in mind, although a 4-wire O2 sensor can be wideband too, in common sense only 5 or 6-wire sensors are called wideband. If your O2 sensor has more than 4-wires, oxygen sensor simulator is not applicable. h5Which sensor has to be tricked?/h5 In general: the downstream but upstream has to work flawless in full range. If you intend to buy a simulator hence decatting, header or modified exhaust, the downstream sensor has to be fooled by all means. See position diagram Headers or precat gutting requires upstream simulator as well.

Questions and answers

h5Can I be positive this chip fixes my CEL issue for good and all?/h5 Yes, Magnum oxygen sensor simulator produces a random fluctuation having assigned with suitable cycle and wave accepted by the ECU. Rest assured, all oxygen sensor related codes will be gone. Upstream sensor if any has to be in good condition though. Please see prerequisites pertaining to sensor type and quantity of simulators. h5What if I simply eliminate factory oxygen sensor?/h5 Oxygen sensor removal will not remedy CEL issue. Suitable fluctuating signal is fundamental to be delivered by the ECU. Zero volt signal triggers another trouble code. h5Why is it so important to cancel the trouble code?/h5 While check engine light is on, ECU restricts the engine performance and vehicle is running in safe / limp mode. MPG is also affected negatively. h5Do I need to buy this heated simulator or I can stick with cheaper EZ CEL Fix?/h5 If you can use the heater of the factory oxygen sensor(s), you may wire up #795 EZ CEL Fix. This heated simulator #661 allows you to remove or eliminate the stock oxygen sensor completely. h5What about 'oxygen sensor bungs' 'mini cats' or any other piggybacks are also supposed to sort our FI problems?/h5 The market is teeming with physical gadgets aiming to fix CEL issues. Vast majority of them doesn't take effect on OBDII vehicles made after 1996. They often don't work even on early fuel injected cars. If your vehicle had been manufactured after 1996 or you drive an early model controlled by a sensitive ECU, these gadgets won't help. The definite solution is a circuit conditions realistic signal, as if a working oxygen sensor would be screwed in the factory exhaust. h5Can I rally my two harnesses into one simulator?/h5 No, simulators can't be spliced. Get rid of oxygen sensor related CEL issue yet today. Flat catalytic converter gutting or plain-tube decats will spoil low- and mid-end torque hence ruined engine flush due to inadequate exhaust back pressure and higher block temperature thus valves, cylinder head and other engine parts are constantly being exposed to undesired extra heat. True enough, maximum horsepower increases it still pertains to a higher RPM which perishes dynamic kick out acceleration throughout the RPM range, mostly on automatic vehicles, therefore to save money on fuel and enhance low and mid-end torque, highly recommended to install a reliable Decat . Plain decatting is judged unprofessional among serious tuners and enthusiasts. Injected gasoline engines controlled by Electronic Control Unit (ECU) or alias Electronic Control Management (ECM) have oxygen sensor or O2 sensors to measure the amount of oxygen contained in the exhaust gas. These sensors deliver the ECU fluctuating voltage according to the actual oxygen consistence of air fuel mixture. When exhaust system is decatted or heavily modified, ECU is reading an oxygen sensor signal being inconsistent with other engine sensor's signal, or signal is out of the range yet accepted, an O2 sensor-related trouble code will be triggered ending up in check engine light issue. CEL or MIL or FI errors abbreviate these failures. While check engine light is on, ECU runs in so called lean limp mode. Safe mode restricts both the fuel trim and the ignition timing and develops an overall limitation on performance, until problem diagnosed and resolved definitely. Therefore if you modified your engine with any upgrade causes the oxygen sensor deliver lower signal than normally, you need to wire up an Oxygen Sensor Simulator. Although your ECU will be tweaked, mixture's air fuel ratio still will remain incorrect hence decatting or any other exhaust modification. Simulators help you remedy CEL problems but will not achieve that basic remapping is crucial when decatting or modifying an exhaust. You might be interested in our further performance chips in order to boost engine horsepower, improve fuel efficiency or both at the same time. EVO-Tech, Dyno-Boost and Smart-Tune-X fuel controllers remap the ECU in order to reprogram the engine management to the performance parts preinstalled on the vehicle. They boost the engine horsepower as well as improve fuel mileage. Magnum Tuning has been dealing with manufacture of performance upgrades since 1994. Our experience warrants peak performance, reliability perfect style. Simulators are made in Europe covered by 10-year warranty. Claims stated in this description are warranted by Magnum Tuning. Oxygen Sensor Simulators are not CARB Approved, and are never to be used on Pollution Controlled Vehicles or on Public Highways in those states and countries simulators are prohibited. Customer agrees and takes responsibility NOT to install the Oxygen Sensor Simulator in order to pass federal or other emission test or to treat check engine light also referred to as CEL/MIL issues.

h5Please read instructions before installation./h5 REQUIRED SKILL: Basic mechanical and electrical skill (wiring, crimping or soldering, amper-test) REQUIRED TOOLING: Hand tools required (multi-meter) ESTIMATED TIME OF INSTALLATION: 30 up to 60 minutes. Installation is Do-It-Yourself. Our easy to follow, the step-by-step instructions will guide you through how to install your oxygen sensor simulator in an hour or less, even if you are not excessively inclined in tuning or hobby gadgeteering. It's fundamental though, being able to identify engine sensors and to establish electronic connections. As a manufacturer for over 22 years we have been standing behind our product line supplying our Customers with full Tech Support 7 days a week via emails. Our certified mechanics who are actively involved in racing and high performance tuning are eager to assist you.

Wiring

Cut the harness of the oxygen sensor.

See colors operations of each wire in car wiring diagram or search for your combination in the table below.

Connect the proper wires with terminals or solder them in place. (Hydrochloric acid recommended if soldering.)

Contact the red cable of the red/black dual wire to the ignition feed + 12V, and the black to the engine frame or battery negative.

Mount the unit to any fixture as far from heat as possible. Lowest temp recommended.

No heater test required in case of 2-wire sensors.

h5Heater adjustment/h5

Heater adjustment is required if heater related CEL code is tripped after installation. This is not uncommon.

Heater dial can be determined with an Amper-test. Take a multi-meter and turn it to AMP mode. Contact the stock sensor's one wire to the battery negative terminal, the red lead of multi-meter to the battery positive and black lead to the other heater wire. Wait 10 seconds until heater warms up (cold and hot amp readings differ) and check the AMP reading. Take note of it. Repeat the same test with the simulator and set the same AMP reading by dialing screw#2. Wire up simulator’s heater wires to the vehicle’s heater harness afterwards. Please see the diagram below.

This O2 Sensor Simulator is available to 1 up to 4-wire zirconia narrowband type oxygen sensors only. 5 or 6-wire wideband, titania or 4-wire wideband sensors are not applicable. Uncertain which part to pick? Contact our Tech Support .

The difference between front and post sensor’s voltage is also monitored. If deviation is excessive, an error code might be triggered on the downstream pier, even though the issue is not caused by the downstream sensor. Upstream sensor also can be slow or stuck, so downstream sensor has to be in mint condition.

Usually aftermarket header ruins the upstream oxygen sensor signal. If so, upstream sensor has to be eliminated as well.

Flat catalytic converter gutting or plain-tube decats will spoil low- and mid-end torque hence ruined engine flush due to inadequate exhaust back pressure and higher block temperature thus valves, cylinder head and other engine parts are constantly being exposed to undesired extra heat. True enough, maximum horsepower increases it still pertains to a higher RPM which perishes dynamic kick out acceleration throughout the RPM range, mostly on automatic vehicles, therefore to save money on fuel and enhance low and mid-end torque, highly recommended to install a reliable Decat .

Plain decatting is judged unprofessional among serious tuners and enthusiasts.

Although Magnum O2 Sensor Simulator makes you enable to adjust the air fuel ratio within a certain range, basically it is not intended to remap the fuel trim. If you are about to override the factory lean fuel programming or you want to optimize the potential of your exhaust upgrade, feel free to check out our fuel controllers .

Oxygen sensor eliminator has to be powered on ignition feed DC 12V. Never connect hot wire to constant battery voltage. This wiring may lead to battery drainage also may fry the circuit.

Smog test result depends on the criteria of your local emissions inspection. Simulator is neither supposed to improve emissions spoiled by an aftermarket pipe or any other upgrade, nor restore factory emissions required for a smog inspection. It is solely intended to help you get rid of ECU safe mode triggered by check engine light issue. It will not allow you to preserve factory emissions level. Simulator tricks the computer delivering mimicked signal is accepted by the ECU but it can’t purify the fume electronically. Cat is intended to attain that physically. Even though restoring of ECU to normal mode from safe mode improves emissions partially, if converter is gutted, worn or defective, original emissions can be preserved by no means.

The simulator is waterproof but not submersible.

Oxygen sensor simulator's signal is set to factory 0.9…0.95V top voltage. Don't adjust signal related screw#1 until CEL issue is resolved. Basically screw#1 should not be dialed unless you want to modify air fuel ratio. We don't bear responsibility for CEL shut down, if signal is not set to the top voltage above.

Color response chart refers to sensor-side colors.

Oxygen sensor simulator is a racing part. Oxygen Sensor Simulators are not CARB Approved, and are never to be used on Pollution Controlled Vehicles or on Public Highways in those states and countries simulators are prohibited. Customer agrees and takes responsibility NOT to install the Oxygen Sensor Simulator in order to pass federal or other emission test or to treat check engine light also referred to as CEL/MIL issues.

o2 sensor tunes sorted out my issue

ever since i installed headers and gutted my cats, P0171 and 174 was tripped. tried to reset ECU, use plug defoulers and bought minicats, codes were still persistent. these o2 sensor tunes sorted out my issue for good. Very simple setup with mimimum knowledge of cars required. Price is fair and magnum stands behind their product line. Satisfied.

CEL did not come on

Sims did work for a Z3 w/ (removed) headers and gutted cat. They do fit and everything and after resetting the ECU, the CEL did not come on after driving about 400 miles. So far so good, will see how it will perform in the long run

7 of 12 people found this review helpful.

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Don't struggle with engine codes

if you have average electrical ability, you can hook up this o2 bypass chip do it yourself in half an hour or even less. Don't struggle with engine codes, bottom line, yes i will recommend this product ot friends

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With our ECU controller, your fuel maps receive an extensive recalibration that delivers horsepower and torque down to the wheels. The performance chip works to optimize the fuel trim for ultimate power and better fuel mileage. Smart Fuel Tuner fools engine sensor signals being read by the ECU, resulting in an adjustment to the fuel curve which causes the increase in power as well as improves acceleration and smoothes out throttle response through the RPM range.

Jeep Wrangler Rubicon O2 Sensor Eliminator

All of the Wrangler Rubicon Oxygen sensor bypasss that we make to your Jeep are made from the best quality raw-materials on the planet and you will be able to check out how O2 Sensor Simulator performs what it was claimed to. Fit your O2 sensor simulator /is supposed to cure Oxygen sensor CEL trouble codes/ on your Wrangler Rubicon motor right now. This tune-up part is supposed to be entirely compatible with your Car, Truck SUV with no compromise. Shop from Magnum Factory Outlet where you get the best price on the web. This state-of-the-art Wrangler Rubicon O2 sensor simulator /is supposed to cure Oxygen sensor CEL trouble codes/ will be fully compatible with your Jeep Car, Truck SUV and will increase the HP /while getting rid of MIL, CEL issue/ and fuel efficiency /after O2 sensor trouble code cancelled/ figures while driving power /because this O2 sensor eliminator resolves O2 sensor related MIL, CEL issue resulted by modified or aftermarket exhaust/ will be also improved. Claims are fully warranted by Magnum. Jeep Oxygen sensor bypass is hard wired into the O2 sensor of your Car, Truck SUV and the results are instant, after proper installation. O2 Sensor Simulator gives you benefits through the oxygen sensor signal and heater resistance of your Wrangler Rubicon. Instructions included in the package. The input of Aribert was, Hello, transaction fast and smooth, installation took some time, my O2 sensor simulator /is supposed to cure Oxygen sensor CEL trouble codes/ works good on my Jeep Wrangler Rubicon. Thx Adam, once again!